CN116211236A - Positioning device and measuring equipment - Google Patents

Abstract

The application discloses a positioning device and a measuring device. The positioning device is used for positioning the eyeball. The positioning device includes a light source and a receiver. The light source is used to emit light to the eyeball; the receiver includes a preset area and an offset area that surrounds at least part of the preset area, and the part located in the preset area The receiver is used to receive the light reflected from the eyeball at the preset position, and part of the receivers located in the offset area is used to receive the light reflected from the eyeball located at the offset position. The positioning device provided by the present application can obtain the relative position of the eyeball.

Description

Positioning devices and measuring equipment

technical field

The present application belongs to the technical field of optical positioning devices, and in particular relates to a positioning device and a measuring device.

Background technique

Eyes are one of the most important organs in human perception, and people use their eyes very frequently. Therefore, people also attach great importance to the health of their eyes. With the development of technology, there are many devices used in ophthalmology, which can be used to diagnose or treat the health of the eye, for example, measuring devices for measuring intraocular pressure and devices for examining the retina, etc. . Due to the needs of diagnosis or treatment, this type of equipment often requires the eyeball to be at a preset position to obtain better diagnosis or treatment results.

However, the existing devices for eyeball positioning often require more human participation to judge the relative position of the eyeballs, that is, the existing devices for eyeball positioning cannot directly obtain the relative position of the eyeballs, which reduces the impact on the relative position of the eyeballs. Efficiency in diagnosing or treating eye health conditions.

Contents of the invention

The embodiment of the present application provides a positioning device and a measuring device, aiming to obtain the relative position of the eyeball.

In the first aspect, the embodiment of the present application provides a positioning device. The positioning device is used for positioning the eyeball. The positioning device includes a light source and a receiver. The light source is used to emit light to the eyeball; Assuming an offset area for regional setting, part of the receivers located in the preset area are used to receive light reflected from the eyeball located in the preset position, and part of the receivers located in the offset area are used to receive light reflected from the eyeball located in the offset position.

According to an embodiment of the first aspect of the present application, the receiver is arranged on one side of the light source in the first direction, and the offset area is arranged around at least part of the preset area on at least one side in the first direction and/or the second direction, Wherein, the first direction intersects with the second direction.

According to any of the preceding implementations of the first aspect of the present application, the receiver includes a plurality of receiving units distributed in an array in the first direction and the second direction, the receiving units include a first receiving unit and a second receiving unit, and the first receiving unit The second receiving unit is located in the preset area and used to receive the light reflected from the eyeball at the preset position, and the second receiving unit is located in the offset area and used to receive the light reflected from the eyeball located at the offset position.

According to any of the preceding implementations of the first aspect of the present application, the positioning device further includes an optical lens, which is used to refract the light emitted by the light source to the eyeball; and/or, the optical lens is used to refract the light reflected from the eyeball to the eyeball. receiver.

According to any of the foregoing implementations of the first aspect of the present application, the optical lens is a convex lens, the receiver and the light source are separately arranged on both sides of the optical axis of the optical lens in the first direction, and the optical lens is arranged on the receiver and the light source in the third direction On the same side of , the light source is adapted to emit light propagating in a third direction, wherein the first direction intersects the third direction.

According to any one of the foregoing implementation manners of the first aspect of the present application, the light source is used to emit light with a predetermined wavelength, and the optical lens is also used to block at least part of light without a predetermined wavelength.

According to any one of the foregoing implementation manners of the first aspect of the present application, the positioning device further includes a distance measuring module configured to measure the distance between the light source and the eyeball in the third direction.

According to any of the foregoing implementations of the first aspect of the present application, the ranging module is connected to the light source and the receiver, and the ranging module is used to obtain the time difference between the light emitted by the light source and the light received by the receiver, and calculate the distance according to the time difference.

According to any one of the aforementioned implementations of the first aspect of the present application, the positioning device further includes a voice module, and the voice module is used to play a voice for the user to perform in the third direction when the difference between the distance and the preset distance is greater than the preset difference. Position adjusted voice.

According to any of the foregoing implementations of the first aspect of the present application, the offset area is set around at least part of the preset area on at least one side in the first direction, and the voice module is further used when the difference between the distance and the preset distance is less than or Equal to the preset difference, and at least partly located on the offset area on one side of the preset area in the first direction when light is received, play a voice that allows the user to adjust the position in the first direction; and/or, bias The shifting area is set around at least part of the preset area on at least one side in the second direction, and the voice module is also used when the difference between the distance and the preset distance is less than or equal to the preset difference, and at least partially located in the preset area When light is received on the offset area on one side in the second direction, a voice for allowing the user to adjust the position in the second direction is played.

In a second aspect, an embodiment of the present application provides a measuring device for measuring intraocular pressure. The measuring device includes a measuring device and a positioning device as in any implementation manner of the first aspect above, and the measuring device is used for measuring intraocular pressure.

A positioning device provided in an embodiment of the present application is used for positioning the eyeball. The positioning device includes a light source and a receiver. The light source is used to emit light to the eyeball. The light emitted from the light source can be reflected at the eyeball, so that the light can be reflected to the receiver and received by the receiver. Since the shape of the eyeball is approximately spherical, when the eyeball is in different positions, the light reflected by the eyeball will hit the receiver at different angles, so that when the eyeball is in different positions, the light will hit different positions of the receiver. By dividing the receiver into a preset area and an offset area enclosing at least part of the preset area, wherein a part of the receiver located in the preset area is used to receive light emitted by a light source and reflected from an eyeball located at a preset position , part of the receiver located in the offset area is used to receive the light emitted by the light source and reflected by the eyeball at the offset position, so that the positioning device can be used to judge whether the eyeball is located at the preset position or at the offset position, so as to obtain the position of the eyeball relative position.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a working schematic diagram of a measuring device including a positioning device when the eyeball is located at a preset position in some embodiments of the present application;

Fig. 2 is a working schematic diagram of a measuring device including a positioning device when the eyeball is located in an offset position according to some embodiments of the present application;

FIG. 3 is a schematic structural diagram of a positioning device in some embodiments of the present application;

Fig. 4 is a schematic structural diagram of positioning devices in other embodiments of the present application;

Fig. 5 is a schematic structural diagram of a positioning device according to some other embodiments of the present application;

Fig. 6 is a working diagram of the positioning device when the eyeball is at a preset position in some embodiments of the present application;

Fig. 7 is a working schematic diagram of the positioning device when the eyeball is located at an offset position in some embodiments of the present application;

Fig. 8 is a working schematic diagram of the positioning device when the eyeball is in the offset position according to other embodiments of the present application;

Fig. 9 is a working schematic diagram of the positioning device when the eyeball is in a shifted position according to some other embodiments of the present application;

Fig. 10 is a working schematic diagram of the positioning device when the eyeball is in an offset position according to some other embodiments of the present application;

Fig. 11 is a working schematic diagram of the positioning device when the eyeball is at a preset position according to other embodiments of the present application;

Fig. 12 is a schematic diagram of a positioning device in some embodiments of the present application;

Fig. 13 is a schematic diagram of the operation of the positioning device when the eyeball is in a shifted position according to some other embodiments of the present application.

Explanation of reference signs:

1 - Positioning device;

11 - light source;

12-receiver; 12a-preset area; 12b-offset area; 121-receiving unit; 121a-first receiving unit; 121b-second receiving unit;

13-Fixer;

14-ranging module; 141-central processing module; 142-TOF measurement module;

15 - voice module;

16 - optical lens;

2 - Measuring device;

4 - eyeball;

41 - pupil;

α-angle;

A-axis;

B - measuring center line;

C-reference central axis;

D-optical axis;

X - first direction;

Y - the second direction;

Z - third direction.

Detailed ways

The characteristics and exemplary embodiments of various aspects of the application will be described in detail below. In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only intended to explain the present application rather than limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application. In the drawings and the following description, at least part of the known structures and techniques are not shown in order to avoid misunderstanding of the present application. Application creates unnecessary obscurity; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described hereinafter may be combined in any suitable manner in one or more embodiments.

It should be noted that, in this article, unless otherwise stated, "plurality" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc. The indicated orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the application . Furthermore, relational terms such as first and second, etc., are used merely to distinguish one entity or operation from another without necessarily requiring or implying that any such actual relationship between the entities or operations exists. relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the statement "comprising..." does not exclude the presence of additional same elements in the process, method, article or device comprising said element.

The orientation words appearing in the following description are the directions shown in the figure, and do not limit the specific structure of the embodiment of the present application. In the description of this application, it should also be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Connected integrally; either directly or indirectly. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

Eyes are one of the most important organs in human perception, and people use their eyes very frequently. Therefore, people also attach great importance to the health of their eyes. With the development of technology, there are many devices used in ophthalmology, which can be used to diagnose or treat the health of the eye, for example, measuring devices for measuring intraocular pressure and devices for examining the retina, etc. . Due to the needs of diagnosis or treatment, this type of equipment often requires the eyeball to be at a preset position to obtain better diagnosis or treatment results. However, the existing devices for eyeball positioning often require more human participation to judge the relative position of the eyeball. For example, the device using the halo observation window for positioning often requires the observer to judge the relative position of the eyeball subjectively. That is, the existing device for eyeball positioning cannot directly obtain the relative position of the eyeball, which makes the effect or efficiency of diagnosing or treating the health of the eye of the device poor.

In order to solve the above technical problems, the present application is provided. In order to better understand the present application, the positioning device and the measuring equipment according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a working schematic diagram of a measuring device including a positioning device 1 when the eyeball 4 is at a preset position in some embodiments of the present application, and Fig. 2 is a working diagram of a measuring device including a positioning device 1 when the eyeball 4 is in an offset position in some embodiments of the present application The working schematic diagram of the measuring equipment, Fig. 3 is the structural schematic diagram of the positioning device 1 of some embodiments of the present application, the dotted line direction in the figure is the propagation path of the light emitted by the light source 11, the X direction is the first direction, and the Y direction is the second direction, The Z direction is the third direction, and the first direction X, the second direction Y and the third direction Z intersect in pairs.

As shown in Figures 1 to 3, the embodiment of the present application provides a positioning device 1, the positioning device 1 is used for positioning the eyeball 4, the positioning device 1 includes a light source 11 and a receiver 12, the light source 11 is used to emit light to the eyeball 4 The receiver 12 includes a preset area 12a and an offset area 12b that surrounds at least part of the preset area 12a, and the part of the receiver 12 located in the preset area 12a is used to receive light reflected from the eyeball 4 at a preset position, Part of the receiver 12 located in the offset area 12b is used to receive the light reflected from the eyeball 4 located in the offset position.

A positioning device 1 provided in the embodiment of the present application is used for positioning the eyeball 4. The positioning device 1 includes a light source 11 and a receiver 12. The light source 11 is used to emit light to the eyeball 4. The light emitted from the light source 11 can be placed at the eyeball 4. Reflection occurs such that light can be reflected towards and received by receiver 12 . Since the shape of the eyeball 4 is approximately spherical, therefore, when the eyeball 4 is in different positions, the light reflected by different surfaces of the eyeball 4 will shoot to the receiver 12 at different angles, so that when the eyeball 4 is in different positions, the light will shoot to Different location areas of the receiver 12 . By dividing the receiver 12 into a preset area 12a and an offset area 12b surrounding at least part of the preset area 12a, wherein the part of the receiver 12 located in the preset area 12a is used to receive light emitted by the light source 11 and located in the preset The light reflected by the eyeball 4 at the offset position, the part of the receiver 12 located in the offset area 12b is used to receive the light emitted by the light source 11 and reflected by the eyeball 4 located at the offset position, so that the positioning device 1 can be used to judge the position of the eyeball 4 is located at a preset position or at an offset position, so as to obtain the relative position of the eyeball 4 .

In the embodiment of the present application, the preset position may be the expected position of the eyeball 4 during diagnosis or treatment, so as to facilitate the diagnosis or treatment of the eye. For example, as shown in Figures 1 and 2, when the positioning device 1 is applied to a measuring device for measuring intraocular pressure, the extension line of the axis A perpendicular to the outer surface of the center of the pupil 41 of the eyeball and the measurement centerline of the measuring device 2 If the distance between the extension lines of B is within a preset range, the eyeball 4 can be considered to be at a preset position, wherein the measurement centerline B of the measuring device 2 can be the centerline of a striker or a pneumatic chamber for measuring intraocular pressure. In the embodiment of the present application, the offset position may be all positions where the eyeball 4 is outside the preset position.

For ease of explanation, in the following embodiments, the distance between the extension line of the axis A perpendicular to the center outer surface of the pupil 41 of the eyeball 4 and the extension line of the measurement centerline B of the measuring device 2 is within a preset range That is, it is determined that the eyeball 4 is at the preset position" as an example for illustration.

In some embodiments, the light source 11 can be a laser transmitter, and the light emitted by the light source 11 can be a laser. Since the light of the laser is relatively concentrated, it is not easy to scatter, so that the light emitted by the light source 11 is reflected by the eyeball 4 and then reaches the receiver 12. , the receiver 12 can acquire the relative position of the eyeball 4 relatively accurately. In some embodiments, the light source 11 may be a semiconductor laser tube, and the scattering angle of the laser emission may be between -2° and 2°. In some embodiments, the light emitted by the light source 11 may be an invisible laser, so that the light emitted by the light source 11 is not easily interfered by external sunlight or other visible light.

In some embodiments, the part of the receivers 12 located in the preset area 12a is used to receive the light reflected by the eyeball 4 located in the preset position, which may refer to that the part of the receivers 12 located in the preset area 12a can sense the The light emitted by the light source 11 and reflected by the eyeball 4 at a preset position generates corresponding position information. In some embodiments, the part of the receivers 12 located in the offset area 12b is used to receive the light reflected from the eyeball 4 located in the offset position, which may refer to that the part of the receivers 12 located in the offset area 12b can sense the The light emitted by the light source 11 and reflected by the eyeball 4 at the offset position generates corresponding position information.

In some embodiments, when some of the receivers 12 located in the offset area 12b do not receive the light emitted by the light source 11, and some of the receivers 12 located in the preset area 12a receive the light emitted by the light source 11, it can be determined that The eyeball 4 is located at a preset position. In some embodiments, when some of the receivers 12 located in the offset area 12b receive the light emitted by the light source 11, or neither the receivers 12 located in the preset area 12a nor the offset area 12b receive the light emitted by the light source 11 When the emitted light is emitted, it can be judged that the eyeball 4 is located at the offset position.

As shown in FIGS. 1 to 3 , in some embodiments, the positioning device 1 may further include a fixing member 13, and the light source 11 and the receiver 12 may be connected to one side of the fixing member 13 in the third direction Z to limit the light source. 11 and the relative movement between the receiver 12.

In some embodiments, the relative position between the light source 11 and the receiver 12 can be set according to the reflective surface of the eyeball 4 at the preset position when the positioning device 1 measures. In some embodiments, there may be various relative positional relationships between the light source 11 and the receiver 12, and the relative positional relationship only needs to satisfy the condition: the light emitted by the light source 11 can be directed to the eyeball 4 at the preset position and can pass through The surface of the eyeball 4 is reflected to a predetermined area 12 a of the receiver 12 . In some embodiments, the relative positional relationship also needs to meet the condition: the light emitted by the light source 11 can be directed to the eyeball 4 at the preset position and can be reflected to the geometric center of the preset area 12a of the receiver 12 via the surface of the eyeball 4 .

FIG. 4 is a schematic structural diagram of a positioning device 1 according to other embodiments of the present application, and FIG. 5 is a schematic structural diagram of a positioning device 1 according to other embodiments of the present application.

The present application does not specifically limit the number of light sources 11 and receivers 12 . As shown in FIG. 4, in some embodiments, one receiver 12 can be set only to receive the light emitted by one light source 11, that is, one receiver 12 and one light source 11 can be set as a transmitting and receiving group, and Multiple groups of transmitting and receiving groups can be set in different orientations in the positioning device 1, for example, the receivers 12 and light sources 11 in one group of transmitting and receiving groups can be distributed on both sides of the reference central axis C extending along the third direction Z, And multiple sets of transmitting and receiving groups can be arranged at intervals around the reference central axis C to improve the accuracy of the positioning device 1 in judging whether the eyeball 4 is at a preset position or at an offset position, thereby improving the accuracy of the positioning device 1 in obtaining the relative position of the eyeball 4 . Wherein, when the eyeball 4 is at the preset position, the extension line of the reference central axis C may coincide with the extension line of the axis A perpendicular to the central outer surface of the pupil 41 of the eyeball 4 .

In other embodiments, as shown in FIG. 5 , a receiver 12 can also be set to receive light emitted by multiple light sources 11 at the same time, that is, a receiver 12 and multiple light sources 11 can be set in the positioning device 1 . When the eyeball 4 is at the preset position, the light emitted by the plurality of light sources 11 can be reflected to the preset area 12a of the receiver 12 through the eyeball 4, and when the eyeball 4 is at the offset position, at least one of the positioning devices 1 The light emitted by the light source 11 can be reflected to the offset region 12 b of the receiver 12 via the eyeball 4 .

In some other embodiments, as shown in FIG. 3 , only one set of transmitting and receiving groups can be set in the positioning device 1, that is, only one light source 11 and one receiver 12 are set in the positioning device 1, so as to reduce the production capacity of the positioning device 1. and manufacturing costs. In this embodiment, the receiver 12 may be disposed on one side of the light source 11 in the first direction X, and the offset region 12b surrounds at least part of the preset region 12a in the first direction X and/or at least in the second direction Y. Set on one side, since the eyeball 4 is spherical, that is, the slopes of the cut planes at different surfaces of the eyeball 4 are different, so that when the eyeball 4 deviates relative to the preset position in the first direction X, the light from the light source 11 passes through the eyeball 4 The reflection angle of the reflection on the surface will also change, that is, the light reflected on the surface of the eyeball 4 will be shifted in the first direction X, and the light on the side of the preset area 12a of the receiver 12 on the first direction X will be shifted. The shifting region 12b can be used to receive light shifted in the first direction X. Similarly, when the eyeball 4 deviates relative to the preset position in the second direction Y, the offset area 12b located on one side of the preset area 12a of the receiver 12 in the second direction Y can be used to receive Offset light is generated in the second direction Y.

Fig. 6 is a working schematic diagram of the positioning device 1 when the eyeball 4 is at a preset position in some embodiments of the present application, Fig. 7 is a working schematic diagram of the positioning device 1 when the eyeball 4 is in a shifted position in some embodiments of the present application, and Fig. 8 is the present application The working schematic diagram of the positioning device 1 when the eyeball 4 is in the offset position of some other embodiments of the application, Fig. 9 is the working schematic diagram of the positioning device 1 when the eyeball 4 is in the offset position of some other embodiments of the application, and Fig. 10 is the working diagram of the positioning device 1 again in the application A working schematic diagram of the positioning device 1 in some embodiments when the eyeball 4 is in an offset position.

In some embodiments, the light source 11 and the receiver 12 can be symmetrically distributed on both sides of the reference central axis C in the first direction X, wherein, as shown in FIG. 6 , when the eyeball 4 is at a preset position, the reference central axis The extension line of C can coincide with the extension line of the axis A perpendicular to the outer surface of the eyeball 4 pupil 41 center, the light source 11 can emit light to the outer surface of the eyeball 4 pupil 41 center, and the light emitted by the light source 11 is at the center of the eyeball 4 pupil 41 After being reflected by the outer surface of the receiver 12, it can reach the predetermined area 12a of the receiver 12.

So that when the eyeball 4 deviates in the first direction X relative to the preset position close to the light source 11, as shown in FIG. 12a is received in the offset area 12b on the side away from the light source 11 in the first direction X; it also makes when the eyeball 4 deviates away from the light source 11 in the first direction X relative to the preset position, as shown in FIG. 8 , by The light emitted by the light source 11 and reflected from the eyeball 4 can be received by the offset area 12 b located on the side of the preset area 12 a of the receiver 12 in the first direction X close to the light source 11 .

So that when the eyeball 4 is positively shifted relative to the preset position in the second direction Y, as shown in FIG. The offset area 12b on the negative side of the second direction Y receives; it also makes when the eyeball 4 produces a negative offset in the second direction Y relative to the preset position, as shown in FIG. 10 , by the light source 11 The light emitted and reflected from the eyeball 4 can be received by the offset area 12b located on the positive side of the preset area 12a of the receiver 12 in the second direction Y. Wherein, the positive direction and the negative direction of the second direction Y are opposite to each other, that is, when the eyeball 4 deviates to a certain direction in the second direction Y, it is located on the side of the preset area 12a opposite to the second direction Y. The light emitted by the light source 11 and reflected from the eyeball 4 can be received on the offset area 12b.

As shown in FIGS. 3-5 , in some embodiments, the receiver 12 may be a matrix receiver 12 . In some embodiments, the receiver 12 includes a plurality of receiving units 121 distributed in an array in the first direction X and the second direction Y, the receiving units 121 include a first receiving unit 121a and a second receiving unit 121b, the first receiving unit The second receiving unit 121b is located in the offset area 12b and is used to receive the light reflected from the eyeball 4 at the offset position.

In some embodiments, since the preset position can have a certain range, there can be multiple first receiving units 121a, so that the first receiving unit 121a can better receive the light reflected from the eyeball 4 . In some embodiments, the first receiving units 121a may also be distributed in an array in the first direction X and the second direction Y.

In some embodiments, the second receiving unit 121b can be arranged completely around the first receiving unit 121a, so that the positioning device 1 can better obtain the offset relationship of the eyeball 4 relative to the preset position.

As shown in FIG. 6 , when the eyeball 4 is at a preset position, the first receiving unit 121 a can receive light emitted by the light source 11 and reflected from the eyeball 4 .

As shown in FIG. 7 , when the eyeball 4 deviates in the first direction X relative to the preset position close to the light source 11, the light emitted by the light source 11 and reflected from the eyeball 4 can be positioned at the first receiving unit 121a at the second position. Received by the second receiving unit 121b on the side away from the light source 11 in one direction X; as shown in FIG. The light reflected from the eyeball 4 can be received by the second receiving unit 121b located on the side of the first receiving unit 121a close to the light source 11 in the first direction X.

As shown in FIG. 9 , when the eyeball 4 deviates positively relative to the preset position in the second direction Y, the light emitted by the light source 11 and reflected from the eyeball 4 can be positioned at the first receiving unit 121a in the second The second receiving unit 121b on the negative side of the direction Y receives; as shown in Figure 10, when the eyeball 4 produces a negative deviation in the second direction Y relative to the preset position, it is emitted by the light source 11 and sent from the eyeball The reflected light can be received by the second receiving unit 121b located on the forward side of the first receiving unit 121a in the second direction Y.

In some embodiments, as shown in FIGS. 6 to 10 , the light emitted by the light source 11 can directly point to the eyeball 4 , for example, the light emitted by the light source 11 is directly directed to the outer surface of the center of the pupil 41 of the eyeball 4 .

FIG. 11 is a working diagram of the positioning device 1 when the eyeball 4 is at a preset position according to other embodiments of the present application.

In other embodiments, as shown in FIG. 11 , the light emitted by the light source 11 needs to pass through other optical elements to reach the eyeball 4 . For example, the positioning device 1 further includes an optical lens 16 for refracting the light emitted by the light source 11 to the eyeball 4 ; and/or, the optical lens 16 is used for refracting the light reflected from the eyeball 4 to the receiver 12 . By arranging the optical lens 16 to refract the light, the position of the light source 11 and the angle of the emitted light can be adjusted more flexibly, and the light reflected from the eyeball 4 can be directed to the receiver 12 at a better angle to improve The accuracy with which the receiver 12 receives light.

In some embodiments, the optical lens 16 can be a convex lens, and the receiver 12 and the light source 11 are separately located on both sides of the optical axis D of the optical lens 16 in the first direction X, and the optical lens 16 is arranged on the receiver 12 and the light source 11 at On the same side of the third direction Z, the light source 11 is used to emit light propagating along the third direction Z, so as to reduce the difficulty of setting the light source 11 .

In some embodiments, the optical axis D of the optical lens 16 may coincide with the reference central axis C.

In some embodiments, the light source 11 is used to emit light with a preset wavelength, and the optical lens 16 is also used to block at least part of the light without a preset wavelength, so as to reduce the impact of sunlight emitted by the light source 11 on the positioning device 1. 4 Disturbance of relative position.

In some embodiments, the light source 11 can emit laser light with a wavelength of 940nm. In some embodiments, the material of the optical lens 16 may be a transparent PC material added with 4% ZnSO4.

For ease of illustration, in the following embodiments, "the light emitted by the light source 11 does not pass through the optical lens 16 and directly points to the eyeball 4" is taken as an example for illustration.

Fig. 12 is a schematic diagram of the positioning device 1 of some embodiments of the present application, and Fig. 13 is a schematic diagram of the operation of the positioning device 1 when the eyeball 4 is in an offset position of some other embodiments of the present application.

As shown in FIG. 12 and FIG. 13 , in some embodiments, the positioning device 1 further includes a distance measuring module 14 for measuring the distance between the light source 11 and the eyeball 4 in the third direction Z. Since the eyeball 4 deviates in the third direction Z relative to the preset position, the light emitted by the light source 11 and reflected on the eyeball 4 may also hit the offset area 12b on the receiver 12, so that the positioning device 1 It is not easy to judge the deviation of the eyeball 4 in the first direction X or the second direction Y, therefore, by setting the ranging module 14 for measuring the distance between the light source 11 and the eyeball 4 in the third direction Z, to obtain the eyeball 4 The offset in the third direction Z relative to the preset position enables the user to adjust the position of the eyeball 4 in the third direction Z first, and then adjust the position of the eyeball 4 in the first direction according to the position information generated by the receiver 12. Position in direction X or a second direction Y.

In some embodiments, the ranging module 14 includes a central processing module 141 for determining the relative position of the eyeball 4 according to the position information generated by the positioning device 1 and the measurement result of the ranging module 14 .

In some embodiments, the user adjusts the position of the eyeball 4 according to the distance between the light source 11 and the eyeball 4 in the third direction Z measured by the ranging module 14, so that the distance between the light source 11 and the eyeball 4 in the third direction Z is equal to After the difference between the preset distances is less than or equal to the preset difference, as shown in FIG. 6, if the first receiving unit 121a receives the light emitted by the light source 11 and reflected from the eyeball 4, and the second receiving unit 121b cannot When receiving the light, the central processing module 141 can judge that the eyeball 4 is at the preset position at this time; as shown in FIG. When the unit 121b receives the light emitted by the light source 11 and reflected from the eyeball 4, the central processing module 141 can judge that the eyeball 4 is located at the preset position on the side close to the light source 11 in the first direction X; as shown in FIG. 8 As shown, if the second receiving unit 121b located on the side of the first receiving unit 121a close to the light source 11 in the first direction X receives the light emitted by the light source 11 and reflected from the eyeball 4, the central processing module 141 can judge this When the eyeball 4 is located at the preset position on the side away from the light source 11 in the first direction X; as shown in Figure 9, if the second receiving unit 121b located on the negative side of the first receiving unit 121a in the second direction Y When the light emitted by the light source 11 and reflected from the eyeball 4 is received, the central processing module 141 can judge that the eyeball 4 is located at the positive side of the preset position in the second direction Y; as shown in FIG. 10 , if When the second receiving unit 121b located on the positive side of the first receiving unit 121a in the second direction Y receives the light emitted by the light source 11 and reflected from the eyeball 4, the central processing module 141 can determine that the eyeball 4 It is located on the negative side of the preset position in the second direction Y.

As shown in FIG. 12 , in some embodiments, the ranging module 14 is connected to the light source 11 and the receiver 12, and the ranging module 14 is used to obtain the time difference between the light emitted by the light source 11 and the light received by the receiver 12 and calculate according to the time difference out spacing.

In some embodiments, the ranging module 14 includes a TOF (Time of flight, light time of flight) measuring module 142, the TOF measuring module 142 is used to calculate the time difference between the light emitted by the light source 11 and the light received by the receiver 12, and the central processing module 141 is used to calculate the distance according to the time difference.

In some embodiments, the ranging module 14 can calculate the distance according to the relationship Lx=cosα*(ct/2), wherein Lx is the distance between the light source 11 and the eyeball 4 in the third direction Z, and α is the distance between the eyeball 4 and the predetermined position. When the position is set, the light reflected from the light source 11 to the outer surface of the center of the pupil 41 of the eyeball and the axis A perpendicular to the outer surface of the center of the pupil 41 of the eyeball 4 is the included angle, c is the speed of light, and t is the light emitted by the light source 11 and received by the receiver 12. Time difference to light. Although when the eyeball 4 is not at the preset position, as shown in FIG. 13 , the angle between the light rays actually incident on the surface of the eyeball 4 by the light source 11 and the axis A perpendicular to the outer surface of the center of the pupil 41 of the eyeball 4 may not reach α, but using The difference between the distance obtained by the above relational expression and the actual distance will not be too large, that is, the distance obtained by the above relational expression can meet the reference requirement.

As shown in FIG. 12 , in some embodiments, the positioning device 1 may further include a voice module 15, and the voice module 15 is used to play a message for the user when the difference between the distance and the preset distance is greater than the preset difference. Voices for position adjustment in three directions Z, so that the user can adjust the orientation of the eyeball 4 adaptively.

In some embodiments, the preset difference may be greater than or equal to 0 and less than or equal to 1mm, and when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is within this range, it includes The measuring equipment for measuring the intraocular pressure of the positioning device 1 can detect the intraocular pressure of the eyeball 4 more accurately. In some embodiments, when the measuring device 2 in the measuring device including the positioning device 1 is a contact tonometer, the preset difference may be equal to 1mm, so that there is a gap between the eyeball 4 and the probe of the contact tonometer. more appropriate spacing.

In some embodiments, the voice module 15 is communicatively connected with the ranging module 14 . In some embodiments, when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is greater than the preset difference and the distance is greater than the preset distance, the voice module 15 can play the A voice approaching the positioning device 1 in the third direction Z. In some embodiments, as shown in FIG. 12 , when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is greater than the preset difference and the distance is smaller than the preset distance, the voice module 15 A voice can be played to make the user move away from the positioning device 1 in the third direction Z.

The present application does not specifically limit the type of the speech module 15, and in some embodiments, the speech module 15 may be a TTS (Text To Speech, from text to speech) speech module.

In some embodiments, the offset area 12b is set around at least part of the preset area 12a on at least one side in the first direction X, and the voice module 15 is also used for when the difference between the distance and the preset distance is less than or equal to the preset difference, and when light is received on the offset region 12b on one side of the preset region 12a in the first direction X at least partly, a voice that allows the user to adjust the position in the first direction X is played; and/or, The offset area 12b is set around at least part of the preset area 12a on at least one side in the second direction Y, and the voice module 15 is also used when the difference between the distance and the preset distance is less than or equal to the preset difference, and at least part of the When the offset area 12b located on the side of the preset area 12a in the second direction Y receives light, a voice for the user to adjust the position in the second direction Y is played.

In some embodiments, when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is less than or equal to the preset difference and the positioning device 1 determines that the eyeball 4 is at the preset position at this time, The voice module 15 can play a voice to inform the user that the location is correct.

In some embodiments, when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is less than or equal to the preset difference, and the positioning device 1 judges that the eyeball 4 is at the preset position When the side of the first direction X is close to the light source 11 , the voice module 15 can play a voice for the user to adjust to the side away from the light source 11 in the first direction X.

In some embodiments, when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is less than or equal to the preset difference, and the positioning device 1 judges that the eyeball 4 is at the preset position When the side away from the light source 11 in the first direction X, the voice module 15 can play a voice for the user to adjust to the side close to the light source 11 in the first direction X.

In some embodiments, when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is less than or equal to the preset difference, and the positioning device 1 judges that the eyeball 4 is at the preset position When the second direction Y is on the positive side, the voice module 15 can play a voice for the user to adjust the second direction Y to the negative side of the second direction Y.

In some embodiments, when the difference between the distance between the light source 11 and the eyeball 4 in the third direction Z and the preset distance is less than or equal to the preset difference, and the positioning device 1 judges that the eyeball 4 is at the preset position When the second direction Y is on the negative side, the voice module 15 can play a voice for the user to adjust the second direction Y to the positive side of the second direction Y.

In some embodiments, the positioning device 1 may further include a display, which is the same as the aforementioned voice module 15, and a pattern may be displayed on the display to prompt the user to adjust the position of the eyeballs. For example, the aperture can be displayed on the display to prompt the user to adjust the position of the eyeballs.

According to some embodiments of the present application, the present application also provides a measuring device for measuring intraocular pressure. The measuring device includes a measuring device 2 and a positioning device 1 as described in any of the preceding embodiments. The measuring device 2 is used for For measuring intraocular pressure.

In some embodiments, the measurement device 2 can be a contact tonometer or a non-contact tonometer, as shown in Figure 1 and Figure 2, the extension line of the measurement center line B of the measurement device 2 can be aligned with the extension line of the positioning device 1 The extension lines of the reference central axis C coincide, wherein the measurement central line B of the measuring device 2 may be the central line of the striker or the pneumatic chamber for measuring intraocular pressure.

The above is only a specific implementation of the present application, and those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described systems, modules and units can refer to the foregoing method embodiments The corresponding process in , will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto, and any person familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the application, and these modifications or replacements should cover all Within the protection scope of this application.

Claims (11)

1. A positioning device for positioning an eyeball, comprising:

a light source for emitting light to the eyeball;

the receiver comprises a preset area and an offset area surrounding at least part of the preset area, wherein part of the receiver positioned in the preset area is used for receiving the light reflected by the eyeball positioned in a preset position, and part of the receiver positioned in the offset area is used for receiving the light reflected by the eyeball positioned in an offset position.

2. Positioning device according to claim 1, wherein the receiver is arranged on one side of the light source in a first direction, and the offset region is arranged around at least part of the predetermined region on at least one side of the first direction and/or a second direction, wherein the first direction intersects the second direction.

3. The positioning device according to claim 2, wherein the receiver includes a plurality of receiving units arrayed in the first direction and the second direction, the receiving units including a first receiving unit located in the preset area and configured to receive the light reflected from the eyeball located at the preset position, and a second receiving unit located in the offset area and configured to receive the light reflected from the eyeball located at the offset position.

4. The positioning device of claim 1, further comprising an optical lens for refracting the light emitted by the light source to the eyeball;

and/or the optical lens is used for refracting the light reflected from the eyeball to the receiver.

5. The positioning device according to claim 4, wherein the optical lens is a convex lens, the receiver and the light source are disposed on both sides of an optical axis of the optical lens in a first direction, the optical lens is disposed on the same side of the receiver and the light source in a third direction, and the light source is configured to emit the light propagating along the third direction, wherein the first direction intersects the third direction.

6. The positioning device of claim 4 wherein the light source is configured to emit light having a predetermined wavelength, and wherein the optical lens is further configured to block at least a portion of light not having the predetermined wavelength.

7. The positioning device of any one of claims 1-6 further comprising a ranging module for measuring a spacing between the light source and the eyeball in a third direction.

8. The positioning device of claim 7 wherein said ranging module is coupled to said light source and said receiver, said ranging module being configured to obtain a time difference between light emitted by said light source and light received by said receiver and to calculate said spacing based on said time difference.

9. The positioning device of claim 7, further comprising a voice module for playing a voice for the user to adjust the position in the third direction when the difference between the distance and the predetermined distance is greater than the predetermined difference.

10. The positioning device of claim 9, wherein the offset area is disposed around at least a portion of the predetermined area on at least one side in the first direction, and the voice module is further configured to play a voice for the user to perform the position adjustment in the first direction when the difference between the pitch and the predetermined distance is less than or equal to the predetermined difference and the light is received at least partially on the offset area on the side of the predetermined area in the first direction;

and/or the offset area is arranged around at least one side of at least part of the preset area in the second direction, and the voice module is further used for playing voice for enabling a user to perform position adjustment in the second direction when the difference between the distance and the preset distance is smaller than or equal to the preset difference and the light is received by the offset area at least partially positioned on one side of the preset area in the second direction.

11. A measurement device for measuring intraocular pressure, comprising:

the positioning device of any one of claims 1-10;

and the measuring device is used for measuring the intraocular pressure.

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